Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1997-03-03
1998-03-24
Lorence, Richard M.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
160188, 49360, E05F 1516
Patent
active
057300275
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a drive mechanism for a drive carrier or the like, adapted to be driven back and forth along a guide rail over a preferably linear path, which can be connected to an object which is to be driven back and forth--in particular a door panel or similar building closure, e.g. an overhead moveable single panel or segmented door--having a preferably electrically motorized drive assembly--drive motor with reducing gear and drive head, the latter particularly in the form of a friction wheel element--and having a drive web, preferably in the form of a flexible textile-belt band and adapted to be connected to the drive carrier--which is looped over a turn-around device, preferably a turn-around roller, and is adapted to be attached to the end of the guide rail remote from the drive mechanism.
It is desired to store and/or to transport drive mechanisms of the above type in the most space-saving manner possible and to complete them as simply as possible at their destination, which means in particular that the guide rail, whose length is dimensioned to the length of the drive path to be traversed, is connected only at the operating site. Of course, this should take place in as simple as foolproof a manner as possible, to which end the drive, prepared for storage and transportation in a small space, is preassembled as much and possible.
Most drive webs, such as the well-known type using chains, but also cable-like drives, are "sensitive" to twisting about their longitudinal axis, which can be readily understood with respect to chains and which, with respect to cables, can cause at least changes in length. It is the case for chains used as a drive web, belt- or band-like drive webs are also sensitive to twisting, i.e. require level runs of web legs in order to provide orderly, long-lasting operation.
The object of the invention is to provide a drive mechanism of the initially described type, which makes possible a space-saving storage and/or transport configuration, and simultaneously an orderly final assembly after connection to the guide rail or guide rail segments, without incurring the risk of a faulty run of the drive web during assembly.
Starting with a drive mechanism having the initially described characteristics, this object is achieved in accordance with the invention by providing the drive mechanism, or its output head, with a storage section which receives, for storage and/or transport inside a small space, the drive web looped over the drive head and dimensioned to correspond to the entire length of the guide rail and shortened in its lengthwise direction by wavelike folds next to the turn-around roller over which that drive web is also looped. The guide rail, which is of one piece or in several pieces which follow one another in the lengthwise direction, is adapted to be connected to the storage section at the installation site, the turn-around device being moveable into its operating position at the end of the guide rail facing away from the drive mechanism and there made fast, while extending the drive web without twisting in the lengthwise direction of the guide rail.
The drive mechanism of the invention is therefore characterized in that a storage section, with the drive assembly, or with its drive head if the actual drive motor and possibly the reduction gear is not preassembled for storage and/or transport, stores the drive web shortened with respect to its operating length, e.g. folded in zigzag or wavy form, in meander-like form or the like, in a correspondingly small space and preassembled on the one hand with the drive head and on the other hand with a turn-around device which, when ready for use, is to be located at that end of the guide rail connected to the drive mechanism which faces away from the storage section. Basically, the storage section can have any desired configuration, but in a particularly preferred embodiment it constitutes the beginning portion of the guide rail at the drive assembly end, which becomes fully available at the utilization site after addition
REFERENCES:
patent: 3153942 (1964-10-01), Staak
patent: 5351441 (1994-10-01), Hormann
Lipton, Esq. Robert S.
Lorence Richard M.
Marantec Antriebs Und Steuerungstechnik GmbH & Co. Produktions K
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